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perf evlist: Disable 'immediate' events last

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Events marked as 'immediate' are started before other events to ensure
that there is context at the start of the main tracing events. The same
is true at the end of tracing, so disable 'immediate' events after other
events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: x86@kernel.org
Link: http://lore.kernel.org/lkml/20200512121922.8997-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2020-05-12 15:19:17 +03:00 committed by Arnaldo Carvalho de Melo
parent 61f82e3fb6
commit 87cf836073
1 changed files with 20 additions and 9 deletions
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29
tools/perf/util/evlist.c
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@ -380,22 +380,33 @@ void evlist__disable(struct evlist *evlist)
{
struct evsel *pos;
struct affinity affinity;
int cpu, i;
int cpu, i, imm = 0;
bool has_imm = false;
if (affinity__setup(&affinity) < 0)
return;
evlist__for_each_cpu(evlist, i, cpu) {
affinity__set(&affinity, cpu);
/* Disable 'immediate' events last */
for (imm = 0; imm <= 1; imm++) {
evlist__for_each_cpu(evlist, i, cpu) {
affinity__set(&affinity, cpu);
evlist__for_each_entry(evlist, pos) {
if (evsel__cpu_iter_skip(pos, cpu))
continue;
if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd)
continue;
evsel__disable_cpu(pos, pos->cpu_iter - 1);
evlist__for_each_entry(evlist, pos) {
if (evsel__cpu_iter_skip(pos, cpu))
continue;
if (pos->disabled || !evsel__is_group_leader(pos) || !pos->core.fd)
continue;
if (pos->immediate)
has_imm = true;
if (pos->immediate != imm)
continue;
evsel__disable_cpu(pos, pos->cpu_iter - 1);
}
}
if (!has_imm)
break;
}
affinity__cleanup(&affinity);
evlist__for_each_entry(evlist, pos) {
if (!evsel__is_group_leader(pos) || !pos->core.fd)